DKJ fitting or JIC (Joint Industrial Committee) is one of the most popular fitting standards used on American-made equipment.
The DKJ fitting has an inch parallel UNF thread and a 74° reverse sealing cone, galvanized. The thread diameter varies from 7/16'' to 2 1/2'' and is used to connect hoses with a conditional internal diameter from 5 to 50 mm.
They are produced in three versions: straight, angled 45º, angled 90º.
Characteristic table
|
Sleeve diameter,
mm
|
Thread,
inch, UNF
|
Number of turns
per inch
|
Outer thread diameter,
mm
|
| 5 |
7/16″ |
20 |
9,7 — 10,0 |
| 5 |
1/2″ |
20 |
11,3 — 11,6 |
| 6 |
7/16″ |
20 |
9,7 — 10,0 |
| 6 |
1/2″ |
20 |
11,3 — 11,6 |
| 6 |
9/16″ |
18 |
12,7 — 13,0 |
| 8 |
1/2″ |
20 |
11,3 — 11,6 |
| 8 |
9/16″ |
18 |
12,7 — 13,0 |
| 8 |
5/8″ |
18 |
— |
| 8 |
3/4″ |
16 |
17,3 — 17,6 |
| 10 |
9/16″ |
18 |
12,7 — 13,0 |
| 10 |
5/8″ |
18 |
— |
| 10 |
3/4″ |
16 |
17,3 — 17,6 |
| 10 |
7/8″ |
14 |
20,2 — 20,5 |
| 12 |
3/4″ |
16 |
17,3 — 17,6 |
| 12 |
7/8″ |
14 |
20,2 — 20,5 |
| 12 |
1 1/16″ |
12 |
24,3 — 24,7 |
| 16 |
7/8″ |
14 |
20,2 — 20,5 |
| 16 |
1 1/16″ |
12 |
24,3 — 24,7 |
| 20 |
7/8″ |
14 |
20,2 — 20,5 |
| 20 |
1 1/16″ |
12 |
24,3 — 24,7 |
| 20 |
1 3/16″ |
12 |
27,6 — 27,9 |
| 20 |
1 5/16″ |
12 |
30,8 — 31,2 |
| 25 |
1 5/16″ |
12 |
30,8 — 31,2 |
| 25 |
1 5/8″ |
12 |
38,7 — 39,1 |
| 32 |
1 5/8″ |
12 |
38,7 — 39,1 |
| 32 |
1 7/8″ |
12 |
45,1 — 45,5 |
| 38 |
1 7/8″ |
12 |
45,1 — 45,5 |
| 32 |
2 1/2″ |
12 |
61,3 — 61,8 |
| 50 |
2 1/2″ |
12 |
61,3 — 61,8 |
